7 letter words:
effects15,
6 letter words:
effect14,
5 letter words:
fiefs11,
fifes11,
stiff11,
teffs11,
tiffs11,
feces10,
fices10,
feist8,
fetes8,
cesti7,
cetes7,
cites7,
4 letter words:
effs10,
fief10,
fife10,
teff10,
tiff10,
fice9,
fisc9,
efts7,
fees7,
feet7,
fest7,
fete7,
fets7,
fist7,
fits7,
seif7,
sift7,
cees6,
cete6,
cist6,
cite6,
etic6,
ices6,
sect6,
sice6,
tics6,
site4,
tees4,
ties4,
3 letter words:
eff9,
iff9,
efs6,
eft6,
fee6,
fes6,
fet6,
fie6,
fit6,
ifs6,
cee5,
cis5,
ice5,
sec5,
sic5,
tic5,
its3,
see3,
sei3,
set3,
sit3,
tee3,
tie3,
tis3,
2 letter words:
ef5,
fe5,
if5,
es2,
et2,
is2,
it2,
si2,
ti2,